Tone, A. 2001.
Trevathan, W. R. 1987.
Vollman, R. F. 1977.
Wolf, J. H. 2001.
Wood, J. W. 1995.
World Health Organization. 2003.
______. 2005.
______. 2006.
______. 2010.
Worth, J. 2002.
Wrangham, R. 2009.
Abou-Saleh, M. T., R. Ghubash, L. Karim, M. Krymski, and I. Bhai. 1998. Hormonal Aspects of Postpartum Depression.
Ahlfeld, F. 1869. Beobachtungen über die Dauer der Schwangerschaft.
Aitken, R. J., P. Koopman, and S. E. M. Lewis. 2004. Seeds of Concern.
Albers, L. L. 1999. The Duration of Labor in Healthy Women.
Alliende, M. E. 2002. Mean Versus Individual Hormonal Profiles in the Menstrual Cycle.
Allsworth, J. E., J. Clarke, J. F. Peipert, M. R. Hebert, A. Cooper, and L. A. Boardman. 2007. The Influence of Stress on the Menstrual Cycle Among Newly Incarcerated Women.
Altmann, J., and A. Samuels. 1992. Costs of Maternal Care: Infant-carrying in Baboons.
Anderson, J. W., B. M. Johnstone, and D. T. Remley. 1999. Breast-feeding and Cognitive Development: A Meta-analysis.
Anderson, K. G. 2006. How Well Does Paternity Confidence Match Actual Paternity?
Anderson, M. J., and A. F. Dixson. 2002. Motility and the Midpiece in Primates.
Anderson, M. J., J. Nyholt, and A. F. Dixson. 2005. Sperm Competition and the Evolution of Sperm Midpiece Volume in Mammals.
Andrade, A. T. L., J. P. Souza, S. T. Shaw, E. M. Belsey, and P. J. Rowe. 1991. Menstrual Blood Loss and Iron Stores in Brazilian Women.
Auger, J., J. M. Kunstmann, F. Gzyglik, and P. Jouannet. 1995. Decline in Semen Quality Among Fertile Men in Paris During the Past Twenty Years.
Backe, B. 1991. A Circadian Variation in the Observed Duration of Labor.
Baker, T. G. 1963. A Quantitative and Cytological Study of Germ Cells in Human Ovaries.
Ben Shaul, D. M. 1962. The Composition of the Milk of Wild Animals.
Benshoof, L., and R. Thornhill. 1979. The Evolution of Monogamy and Concealed Ovulation in Humans.
Bergsjø, P., D. W. Denman, H. J. Hofman, and O. Meirik. 1990. Duration of Human Singleton Pregnancy: A Population-Based Study.
Bernier, M. O., G. Plu-Bureau, N. Bossard, L. Ayzac, and J. C. Thalabard. 2000. Breastfeeding and Risk of Breast Cancer: A Meta-analysis of Published Studies.
Bielert, C., and J. G. Vandenbergh. 1981. Seasonal Influences on Births and Male Sex Skin Coloration in Rhesus Monkeys (
Billings, J. J. 1981. Cervical Mucus: The Biological Marker of Fertility and Infertility.